Sulk
来自Big Physics
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late 18th century: perhaps a back-formation from sulky.
wiktionary
Back-formation from sulky, of uncertain origin. Probably from Middle English *sulke, *solke (attested in solcennesse(“idleness; laziness”), from Old English āsolcennys(“idleness; slothfulness; sluggishness; laziness”), from āsolcen(“sulky, languid”), from past participle of Old English āseolcan(“be slow; be weak or slothful; languish”), from Proto-Germanic *selkaną(“to fall in drops; dribble; droop”), from Proto-Indo-European*sélǵ-o-nom, from *selǵ-(“to let go, send”). Cognate with several Indo-Iranian words deriving from Proto-Indo-Iranian *sarȷ́- [1] (such as Sanskrit सृजति(sṛjáti), सर्जति(sarjati), सर्जन(sárjana), सृक(sṛká)), possibly Hittite 𒊭𒀠𒀝𒍣(ša-al-ak-zi/šalkzi/, “knead, mix”), although the semantic connection is weak. [2]
Latin sulcus.
etymonline
sulk (v.)
1781, back-formation of sulky (adj.). Related: Sulked; sulking. As a noun from 1792.
